Mr. Christopher D. Sorrells, also known as Chris, has been the Chief Operating Officer of GSE Systems Inc. since August 2015. Mr. Sorrells serves as Vice President at CaseStack Inc. Mr. Sorrells served as Interim Chief Operating Officer of GSE Systems Inc. from August 25, 2015 to August 2016. He was a Managing Director of NGP Energy Technology Partners. Mr. Sorrells joined NGP Energy Technology Partners in 2005 and focused primarily on the environmental services sector. Prior to this, Mr. Sorrells served as Vice President at Clarity Partners, LP and served there from September 2003 to September 2005, where he pursued growth financings and middle market LBO transactions. He started working on energy technology transactions in 1996. Mr. Sorrells served as a Principal in the Investment Banking Department at Bank of America Corporation and as an Associate in investment banking Salomon Smith Barney from August 1996 to June 1998 covering energy and power companies. He worked at Banc of America Securities covering energy, power and energy technology companies. He founded Bank of America's Energy Technology Investment Banking Group in 1999 and headed it from 2000 to 2002 and served as its Member of the Natural Resources Group and the Lead Banker on a broad range of transactions, including many private equity financings and was involved in a broad range of transactions. Mr. Sorrells was an Investment Banker at Salomon Smith Barney, where he focused on energy and power companies. From 1991 to 1994, he worked in sales and marketing for a firm. He has been Vice Chairman of the Board at Renewable Energy Group, Inc. since September 2016 and also serves as its Lead Director. Mr. Sorrells has been a Board Member of Lehigh Technologies, LLC since January 2007, Living Earth Technology Company and Renewable Energy Group, Inc. since November 2008. He has been a Director of GSE Systems Inc. since March 7, 2012. He also serves as the Director of Waste Resource Management, Inc. He is a Board Member of groSolar, Inc., Chesapeake Solar LLC, Midwest Optoelectronics, LLC and MWOE Solar. Mr. Sorrells serves as a Board Observer at Community Energy. He served as a Director of Global Resource Options, Inc. He served as a Director of CaseStack, Inc., since August 2005. He served as a Director of Xunlight Corporation and Westec Interactive. He has over 18 years of experience with energy, power and environmental service companies. Mr. Sorrells holds an M.B.A. from the College of William and Mary, a Masters of Accounting degree from the University of Southern California and a B.A. from Washington and Lee University.